High River-Flow Advisory
Due to rising temperatures, mountain snowpack in the Upper Colorado River basin is melting and generating high flows on the Colorado and Green Rivers through Canyonlands National Park. In the last forecast issued on May 19th, the Colorado Basin River Forecast Center projected that there is a 50 percent probability that peak mean daily flows through Canyonlands will exceed 24,000 cfs (cubic feet per second) on the Green River, 37,000 cfs on the Colorado River above the Confluence, and 60,000 cfs on the Colorado River below the Confluence in Cataract Canyon. Peak flows normally occur during the period from mid-May until mid-June. High river flows can present many types of challenges to boaters, and river users should be aware of high-flow conditions when planning their trips. Boater awareness and appropriate planning are necessary for a successful river trip.
For the latest information on current and forecast river flows, see the following:
Information for White Rim Users
High water on the Green River floods the White Rim road, making it impassable at Upheaval Bottom and the northwest park boundary area. White Rim users should contact the Island in the Sky Visitor Center (435-259-4712, ext.0) for road conditions. Carry extra fuel and be prepared to exit via the Shafer Trail or Potash Road. Off-road travel to avoid flooded road sections is prohibited.
Information for River UsersThe Green and Colorado Rivers and the nature of your boating experience can change significantly at high flows. Boaters should be aware of the following -
Fewer campsites are available during high-flow conditions than during low-flow conditions.
Flows are faster during high-flow conditions.
Water temperatures are cold during high-flow conditions.
Rapids change in difficulty depending on river flows.
NPS river rangers will be making periodic patrols on the rivers, but will not maintain an extended presence below the rapids in Cataract Canyon.